Re: User32 And GDI32 Wrapper Feedback

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  • Posted by mattlewis (admin) Jul 19, 2012
  • 1505 views
coconut said...

You can't pass a string to a WIN32 API function. Windows knows nothing about euphoria sequence. this should be something like that: 

procedure WinHelp(atom handle,sequence str,atom ex,atom ex2) 
atom pStr 
         pStr = allocate_string(str)	 
	 c_proc(xWinHelp,{handle,pStr,ex,ex2}) 
         free(pStr) 
	 
end procedure

With euphoria 4.0, you can simplify this a bit so that you don't have to worry about memory management: 

procedure WinHelp(atom handle,sequence str,atom ex,atom ex2) 
atom pStr 
	 c_proc(xWinHelp,{handle,allocate_string(str, 1),ex,ex2}) 
end procedure

Adding the extra 1 to the allocate_string() call causes the pointer to be freed once there are no more euphoria references to it.

Matt

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